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更新时间:2022-09-29 GMT+08:00
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RegionServer实例异常,处于Restoring状态

问题背景

HBase启动失败,RegionServer一直处于Restoring状态。

原因分析

查看异常的RegionServer实例的运行日志(/var/log/Bigdata/hbase/rs/hbase-omm-XXX.log),发现显示以下打印信息ClockOutOfSyncException...,Reported time is too far out of sync with master
2017-09-18 11:16:23,636 | FATAL | regionserver21302 | Master rejected startup because clock is out of sync | org.apache.hadoop.hbase.regionserver.HRegionServer.reportForDuty(HRegionServer.java:2059)
org.apache.hadoop.hbase.ClockOutOfSyncException: org.apache.hadoop.hbase.ClockOutOfSyncException: Server nl-bi-fi-datanode-24-65,21302,1505726180086 has been rejected; Reported time is too far out of sync with master.  Time difference of 152109ms > max allowed of 30000ms
at org.apache.hadoop.hbase.master.ServerManager.checkClockSkew(ServerManager.java:354)
...

...
2017-09-18 11:16:23,858 | ERROR | main | Region server exiting | org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.start(HRegionServerCommandLine.java:70)
java.lang.RuntimeException: HRegionServer Aborted

该日志说明异常的RegionServer实例和HMaster实例的时差大于允许的时差值30s(由参数hbase.regionserver.maxclockskew控制,默认30000ms),导致RegionServer实例异常。

解决办法

调整异常节点时间,确保节点间时差小于30s。

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